Apple

I am using ExtAudioFileRead to convert MP3 data into PCM data in iPhone Sdk. But this function is returning -50 as error status code. Can any body help me in this regards

AudioStreamBasicDescription inputFormat;

size = sizeof(inputFormat);

ExtAudioFileGetProperty(inFile, kExtAudioFileProperty_FileDataFormat, &size, &inputFormat);

AudioStreamBasicDescription clientFormat = inputFormat;

clientFormat.mFormatID = kAudioFormatLinearPCM;

clientFormat.mFormatFlags = kAudioFormatFlagsCanonical;

clientFormat.mBitsPerChannel = 8*sizeof(AudioSampleType);

clientFormat.mChannelsPerFrame = 2;

clientFormat.mFramesPerPacket = 1;

clientFormat.mBytesPerPacket = clientFormat.mBytesPerFrame = 2 * sizeof(AudioSampleType);

size = sizeof(clientFormat);

ExtAudioFileSetProperty(inFile, kExtAudioFileProperty_ClientDataFormat, size, &clientFormat);